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Finding the Fourth Proportional to 907.31, 1,252.02 and 509.01

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Solution

The fourth proportional to 907.31, 1,252.02 and 509.01 is: 702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.31 : 1,252.02 = 509.01 : x
  2. Step 2: Convert to fraction form
    907.31/1,252.02 = 509.01/x
  3. Step 3: Cross multiply
    907.31x = 1,252.02 × 509.01
  4. Step 4: Simplify right side
    907.31x = 637,290.70
  5. Step 5: Solve for x
    x = 637,290.70/907.31
  6. Step 6: Final answer
    x = 702.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.